On Tuesday, the National Rifle Association broke its days of silence following Friday’s massacre in Newtown. The NRA issued a statement saying it was "shocked, saddened and heartbroken" by the attack at the Sandy Hook Elementary School, which killed 20 children and six women at the school, and was ready to offer “meaningful contributions to help make sure this never happens again.” The group said it would reveal further details in a Friday news conference. One of the nation’s most powerful political lobbying groups for years, the NRA has successfully blocked proposals to limit gun sales or ownership. It has aggressively supported political candidates who back its agenda and opposed those who don’t. But even some pro-NRA lawmakers are now calling for limits on guns. Does this signal that the group’s power is permanently on the wane? Or will the NRA keep its clout as time goes on and emotions cool? Is it fair to put any blame on the NRA for the latest shooting, or any others?